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经营范围
发明名称
DOWNHOLE WELL TOOL VALVE
摘要
申请公布号
EP0370652(A3)
申请公布日期
1991.10.23
申请号
EP19890311428
申请日期
1989.11.03
申请人
HALLIBURTON COMPANY
发明人
MCMAHAN, MICHAEL E.
分类号
E21B23/00;E21B34/10;E21B43/116;E21B43/1185;E21B49/00;E21B49/08;(IPC1-7):E21B34/10;E21B43/118
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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